M939A2 |
Country of origin |
United States |
Entered service |
1982 |
Configuration |
6x6 |
Cab seating |
1 + 2 men |
Dimensions and weight |
Weight (empty) |
9.95 t |
Maximum load |
4.56 t |
Length |
7.89 m |
Width |
2.47
m |
Height |
3.07 m |
Mobility |
Engine |
Cummins 6CTA8.3 diesel |
Engine power |
240 hp |
Maximum road speed |
86 km/h |
Range |
400 ~ 500 km |
Maneuverability |
Gradient |
60% |
Side slope |
30% |
Vertical step |
~ 0.6 m |
Trench |
~ 0.7 m |
Fording |
0.76 m |
Fording (with preparation) |
1.5 m |
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The M939
series of military trucks was developed in the 1970s. It is an
updated version of the earlier
M809 series.
Its primary function logistical transportation of all types of
supplies, mainly on hard surface roads. The programme was plagued
with delays and first units were delivered only in 1982. In 1986
production of the M939 series was transferred from the AM General to
BMY. Although AM continued in production for a while. A great number
of these general utility trucks are still in service with the US
Military. Some sources report that about 32 000 are operational. The
US Marine Corps are replacing the M809 and M939 series trucks with
the new
MTVR.
The overall
appearance of the M939 is similar to that of the M809, however there
were many detailed changes. The new truck had better overall
performance, improved cooling and electrical systems. It is worth
mentioning that the M939 series supplemented the previous M809
series without replacement.
The M939
series vehicles typically have a payload capacity of 4 560 kg. This
military truck is capable of towing trailers or artillery pieces
with a maximum weight of over 9 000 kg.
Cab of the
M939 provides seating for the driver and two passengers. It is worth
mentioning that the earlier models could seat three only at a
squeeze. Both soft- and hardtops were available. Cargo area is
covered with removable bows and canvas cover.
The original
M939 and improved M939A1 trucks used a Cummins NHC-250 diesel
engine, developing 250 hp. The M939 series trucks were fitted with
an automatic transmission and improved transfer case, to match the
transmission. It has a full-time all-wheel-drive. A central tyre
inflation system was fitted on some vehicles. It enables the driver
to increase or decrease the air pressure in the tyres, to improve
mobility over mud, sand and snow. The M939 military trucks are
capable of wading up to 1.5 meters with add-on kit.
The M939
series was produced in a wide array of M-number models, from M923 to
M945 inclusive. Most of these models differed only in having a winch
or not, or in wheelbase length. All models share a common engines,
chassis and other components. The original M939 (M939A0) can be
easily identified by double rear wheels.
Variants
M923
standard cargo truck with a soft-top cab.
M925 similar
to the M923, but fitted with a winch.
M927 long
wheelbase cargo truck.
M928 similar
to the M927, but fitted with a winch.
M929 dump
truck.
M930 similar
to the M929, but fitted with a winch.
M931 tractor
truck, equipped with a fifth wheel and used to haul semitrailers
with loads up to 16 800 kg off-road and 24 900 kg on hard surface
roads.
M932 similar
to the M931, but fitted with a winch.
M934 van
body, often used as a mobile command post.
M936
wrecker. Its winch and crane capacities are similar to the M816
wrecker.
The M939A2
is a version, powered by a smaller, yet more powerful Cummins
6CTA8.3 8.3-liter turbocharged diesel engine, which provides a
greater range. It uses the same automatic transmission. This model
had a reduced curb weight and was equipped with a central tyre
inflation system as standard. This version was produced by the BMY.
The US Army received these trucks in 1989.
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